Pilot protection of active distribution network based on novel positive-sequence fault component comprehensive impedance

被引：0

作者：

Wang, Yabing ^{[1
]}

Tong, Xiaoyang ^{[1
]}

Zhao, Zibin ^{[1
]}

Dong, Xingxing ^{[1
]}

Manzoor, Sohail ^{[1
]}

机构：

[1] School of Electrical Engineering, Southwest Jiaotong University, Chengdu

来源：

Dianli Zidonghua Shebei/Electric Power Automation Equipment | 2025年 / 45卷 / 02期

关键词：

active distribution network; distributed generator; new comprehensive impedance; pilot protection; positive-sequence fault component; relay protection; short fault;

D O I：

10.16081/j.epae.202411020

中图分类号：

TM72 [输配电技术];

学科分类号：

摘要：

The access of distributed generators to distribution network changes the topology of the traditional distribution network, which changes fault characteristics, and conventional distribution network current protection will lose its selectivity. Aiming at this problem,a novel protection method based on the comprehensive impedance of positive sequence fault component is proposed. The fault characteristics of positive-sequence fault voltages and currents are analyzed when internal and external faults occur in the line with different types of distributed generations. The positive-sequence fault components of voltage and current at both ends of the section are used to calculate the estimated line impedances on both sides, the new comprehensive impedance is obtained by their subtraction. Taking the ratio of comprehensive impedance to line impedance as impedance coefficient, and then the protection criterion of internal and external short circuit faults is constructed. The effectiveness of proposed protection algorithm is verified by a large number of Simulation experiments. It can accurately detect short circuit faults, and is not affected by fault type, fault location, type and permeability of distributed generator, distributed generator exit, and has high sensitivity and strong resistance to transition resistance. © 2025 Electric Power Automation Equipment Press. All rights reserved.

引用

页码：103 / 109

页数：6

共 21 条

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